原创 tablespace occuped with autoextent managment and tempfile
SELECT ddf.tablespace_name, SUM( distinct ddf.ddfbytes ) / 1048576 maxp
原创 Reducing CPU problem caused due to high buffer gets (after large delete)
Reducing CPU problem caused due to high buffer gets. Couple of month’s back I was working on tuning one of the telecom
原创 size tablespace autoextend and temp managed
SELECT tablespace_name, round(SUM(used)/1024/1024) USED_MB, round((SUM(total)/1024/1024),0) MAXSIZE_MB, TO_CHAR(100*SU
原创 memcached相關技術
1.概述 Memcached 是一個高性能的分佈式內存對象緩存系統,用於動態Web應用以減輕數據庫負載。它通過在內存中緩存數據和對象來減少讀取數據庫的次數,從而提供動態、數據庫驅動網站的速度。Memcached基於一個存儲
原创 Tokyo Cabinet與 Tokyo Tyrant
Tokyo Cabinet 是日本人 Mikio Hirabayashi開發的一款 DBM 數據庫,該數據庫讀寫非常快,哈希模式寫入100萬條數據只需0.643秒,讀取100萬條數據只需0.773秒,是 Berkeley DB 等 DBM
原创 C++庫大全
基礎類1、 Dinkumware C++ Library 參考站點:http://www.dinkumware.com P.J. Plauger編寫的高品質的標準庫。P.J. Plauger博士是Dr. Dobb's程序設計傑出獎的獲得
原创 List sessions and some details about them
set linesize 145set pagesize 1000set trimout onset trimspool onSet Feedback offset timing offset verify
原创 show log file info and log switches
column day format a16 heading 'Day' column d_0 format a3 heading '00' column d_1 format a3 heading '01' column d_2 f
原创 Shows the reason for multiple statement childs in shared pool
rem output only those statements that have more than 5 versions:define versions=5select version_count,address,hash_valu
原创 Capture the total CPU consumptions for an Instance
Create a file as bellow named cpu.sh--------------------:/u01/app/oracle=>cat cpu.sh for para1 in $*d
原创 Opt_param: a new optimizer hint for 10gR2
"OPT_PARAM" is a new optimizer hint introduced in 10gR2. This hint behaves the same way as setting a pa
原创 Quick check of asm disk space
#!/bin/bash. /home/oracle/set_oraenvsid="+ASM1"echo "Check Space on "$sidexport ORACLE_SID=$sidasmcmd << EOFlsdgEOF
原创 put your own progress information in V$SESSION_LONGOPS
If only more developers used the DBMS_APPLICATION_INFO package. As a DBA I often see requests to investigate why a par
原创 Explain plan for last executed statement
define plan_table=PLAN_TABLEset linesize 132 pagesize 1000 feedback off verify off column statement_id
原创 Retreive new hashvalue and display their load
alter session set nls_territory=france;alter session set nls_numeric_characters=", ";WITHp AS ( SELECT to_date(